Women seeking abortions in Wisconsin will have to undergo an ultrasound first, according to a new bill Gov. Scott Walker signed into law Friday.

The new law also bans doctors from performing abortions unless they have admitting privileges at a nearby hospital.

Executive Director of Wisconsin Right to Life Barbara Lyons praised Gov. Walker for honoring his promise to sign the bill.

But abortion activists object to the new law, saying legislators should not force women to undergo a medical procedure.

They also claim the bill will force at least two abortion clinics to shut their doors because providers lack the required hospital admitting privileges.

Planned Parenthood and the American Civil Liberties Union have filed a federal lawsuit challenging the law.

"What the legislature has done is to set up a system where the ability to provide abortions is contingent on the decision of a private institution and that's unconstitutional," Planned Parenthood attorney Lester Pines said.

Planned Parenthood and the ACLU are also asking for a temporary restraining order to prevent the law from taking effect.

The state Department of Justice, which defends state laws, is reviewing the lawsuit and will then respond in court.

"It's no surprise they'll be challenging," Wisconsin Right to Life's Barbara Lyons said. "They see their livelihood threatened, their income threatened. We don't think in the long run they'll be successful."